北太平洋垃圾带的形成与变化Formation and Variation of the Great Pacific Garbage Patch

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1、FormationandVariationoftheGreatPacificGarbagePatchXiaobenLiu,LiuwuShi,YueZhaoAbstractWebuildfourmodelstodoadeepanalysisontheformation,variationanddistributionoftheGreatPacificGarbagePatch.Thefirsttwomodelsarecreatedtoresearchthemechanismofhowthegarbageislandcomesint

2、oexistencefromamicroscopicscale.Thevelocityoftrashalleviatesastimegoeson.Trashdoesitsmotionintwoprobableways,oneisduetoresistancesgivenbyseawater,anotherisduetodampvibration.Usingclassicphysicaltheories,wecapturemainmotivespropellingtrashintotheNorthPacificGyre.Thet

3、hirdmodelisacompartmentmodelaimingtofindthepossibleincreasingamountoftrashinthegarbagepatch.Afunctionoftotalgarbageamountisextrapolatedfromthemodel.Weusethismodeltopredictthatthenumberofplasticdebriswillbemorethanthreetimeslargerinthenext10yearssuccessfully.Inourfou

4、rthmodel,weworkoutadensityfunction.Usingthefunction,wedepictthetemporalandspatialdistributionofgarbageintheocean.Wealsomakeasimulationreflectingitsdistributingrulesmoreobviously.Atlast,wereleasesomesuggestionstoprohibitdeteriorationintheGreatPacificGarbagePatch.Intr

5、oductionWhereisthelargestlandfillintheworld?It’sinthePacificOcean,aboutonethousandkilometersneartheshoreofAmerica,calledtheGreatPacificGarbagePatch.It’saspecificareabetweenCaliforniaStateandHawaii,butuntilnowthere’snoaccurateestimationaboutitscoverage.TheGreatPacifi

6、cGarbagePatchisnotoriousforitshighconcentrationoflitteredtrash,plasticdebris.Accordingtoarecentinvestigation,80percentofthetrashisfrommaincontinents,10percentconsistsofusednetsorotherfishingtoolsandtheother10percentoftrashisfrompassing-byships.Mostofthegarbageisland

7、sareinoceanicgyres.Undoubtedlytheaccumulationofgarbagehasalreadymadehugenegativeinfluenceontheenvironment.Largeamountofoceanicanimalsdieofeatingupplastictrashbymistake.It’sacriticalmomenttoreleasesomefeasibleandpracticalmethodstopreventdeterioration.Propermethodsinv

8、olvecomprehensiveinformationabouttheobject.Weverifymanybasicparameterscharacterizingtheformationprocessofthehugelandfill.Theeffectofoceanc